Infinite animation for image changes in imageView ios - ios

Question

I want to implement the next situation: step by step change image in uiImageView with UIViewAnimationOptionTransitionCrossDissolve animation.
I've tried the following:
[UIView transitionWithView:imageView
duration:2.0f
options: UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionTransitionCrossDissolve | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
animations:^{
imageView.image = [self.images objectAtIndex:self.currentIndex];
self.currentIndex ++;
if (self.currentIndex >2) self.currentIndex = 0;
} completion:^(BOOL finished) {
}];
But this does not even start animation.
The only thing makes it work - use recursion for that purpose:
- (void) switchBckgroundWithIndex: (NSInteger) index imageView: (UIImageView*) imageView
{
if (index >=[self.images count]) index = 0;
#weakify(self)
[UIView transitionWithView:imageView
duration:2.0f
options: UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionTransitionCrossDissolve
animations:^{
#strongify(self)
imageView.image = [self.images objectAtIndex:index];
} completion:^(BOOL finished) {
#strongify(self)
[self switchBckgroundWithIndex:index+1 imageView:imageView];
}];
}
How can i change images repeatedly with those animation effect without using recursion? Please, help me to find solution

Answer 1

I have used this method for animating images in UIImageView
-(void)viewDidLoad
{
[super viewDidLoad];
mutArr=[[NSMutableArray alloc]init];
[mutArr addObject:#"b1#2x.png"];
[mutArr addObject:#"b2#2x.png"];
[mutArr addObject:#"b3#2x.png"];
[mutArr addObject:#"b4#2x.png"];
NSTimer *timerForImage = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(animateImages) userInfo:nil repeats:YES];
}
-(void)animateImages
{
imageCount = imageCount + 1;
NSString *imageName =[NSString stringWithFormat:#"%#",[mutArr objectAtIndex:imageCount]];
if (imageCount==4)
{
imageCount=0;
}
_imgVw.image = [UIImage imageNamed:imageName];
CATransition *transition = [CATransition animation];
transition.duration = 1.0f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionFade;
[_imgVw.layer addAnimation:transition forKey:nil];
}

Answer 2

#interface abc ()
{
int imgCount;
}
then in -
- (void)viewDidLoad
{
[super viewDidLoad];
imgCount = 0;
[self animateAllImages];
}
- (void)animateAllImages
{
NSArray *animationImages = #[[UIImage imageNamed:#"Image1"], [UIImage imageNamed:#"Image2"],[UIImage imageNamed:#"Image3"],[UIImage imageNamed:#"Image4"]];
UIImage *image = [animationImages objectAtIndex:(imgCount % [animationImages count])];
[UIView transitionWithView:self.animationImageView
duration:0.8f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
self.animationImageView.image = image;
} completion:^(BOOL finished) {
[self animateAllImages];
imgCount++;
}];
}